Vaporization enthalpies of a series of the fluoro- and chloro-substituted methylbenzenes

• We measured vapor pressure of seven halogenobenzenes.
• Molar vaporization enthalpies at 298 K were derived.
• We examined consistency of new and available in the literature data.
• Group-additivity was developed for prediction vaporization enthalpies.

Vapor pressures of fluorobenzene, chlorobenzene, 2-chloro-, 3-chloro-, and 4-chloro-methylbenzenes, 2-chloro-1,3-dimethylbenzene, 2,6-dichloro-1-methylbenzene were measured by the transpiration method. Molar standard enthalpies of vaporization at the reference temperature were calculated from temperature dependences of vapor pressures. Available literature data on halogenobenzenes were collected and evaluated by using correlation gas-chromatographic method. Simple group-additivity procedure was developed for estimation vaporization enthalpies of mono- and di-halogen-substituted benzenes.